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© 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

This study aimed to investigate the role of Se supply in improving osmotic stress tolerance in coffee seedlings while also evaluating the best timing for Se application. Five times of Se foliar application were assessed during induced osmotic stress with PEG-6000 using the day of imposing stress as a default, plus two control treatments: with osmotic stress and without Se, and without osmotic stress and Se. Results demonstrated that osmotic stress (OS) promoted mild stress in the coffee plants (ψw from −1.5MPa to −2.5 MPa). Control plants under stress showed seven and five times lower activity of the enzymes GR and SOD compared with the non-stressed ones, and OS was found to further induce starch degradation, which was potentialized by the Se foliar supply. The seedlings that received foliar Se application 8 days before the stress exhibited higher CAT, APX, and SOD than the absolute control (−OS-Se)—771.1%, 356.3%, and 266.5% higher, respectively. In conclusion, previous Se foliar spray is more effective than the Se supply after OS to overcome the adverse condition. On the other hand, the post-stress application seems to impose extra stress on the plants, leading them to reduce their water potential.

Details

Title
Foliar Selenium Application to Reduce the Induced-Drought Stress Effects in Coffee Seedlings: Induced Priming or Alleviation Effect?
Author
Ferreira de Sousa, Gustavo 1 ; Silva, Maila Adriely 1   VIAFID ORCID Logo  ; Rocha de Carvalho, Mariana 2   VIAFID ORCID Logo  ; Everton Geraldo de Morais 1   VIAFID ORCID Logo  ; Pedro Antônio Namorato Benevenute 1 ; Gustavo Avelar Zorgdrager Van Opbergen 1 ; Guilherme Gerrit Avelar Zorgdrager Van Opbergen 1 ; Luiz Roberto Guimarães Guilherme 1   VIAFID ORCID Logo 

 Soil Science Department, Federal University of Lavras, Lavras 37200-000, MG, Brazil; [email protected] (G.F.d.S.); [email protected] (M.A.S.); [email protected] (E.G.d.M.); [email protected] (P.A.N.B.); [email protected] (G.A.Z.V.O.); [email protected] (G.G.A.Z.V.O.) 
 Department of Biology, Federal University of Lavras, Lavras 37200-000, MG, Brazil; [email protected] 
First page
3026
Publication year
2023
Publication date
2023
Publisher
MDPI AG
e-ISSN
22237747
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2862615366
Copyright
© 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.